yeh, last weekend i replaced the stock horn with dual air horns, ah what a nice sound.. there are two ways to do this. one is way easier than the other. you can remove the front and bottom panels with torx 20,30 drivers though that will take about a good hour, or if your hands are small enough (mine arent..) you can reach into the drivers side, see the blue and brown wires? those attach to the stock horn which is mounted there on brackets. you just need to figure out how to wire and place the air compressor, run the tubing to the horns and hook it all up in a way that will fit and not get in the way of other bits... i will take some pics later if anyone is interested?